{"lens":{"id":"c-mount","displayName":"C-mount","manufacturer":"Various (cine / industrial standard)","flangeDistanceMm":17.526,"electronicProtocol":"mechanical-only"},"body":{"id":"fujifilm-x","displayName":"Fujifilm X","manufacturer":"Fujifilm","flangeDistanceMm":17.7,"electronicProtocol":"Fujifilm X"},"compat":{"lensMountId":"c-mount","bodyMountId":"fujifilm-x","feasibility":"mechanical","af":"n/a","is":"n/a","aperture":"manual-ring","infinityFocus":"no","adapterExamples":["Generic C-FX rings (Fotodiox, Kipon)"],"caveats":["APS-C sensor (~28 mm diagonal) is more than 2× the C-mount image circle — heavy vignetting on every lens. Image is usable only with a heavy central crop.","C-mount flange 17.526 mm vs X-mount 17.7 mm — clearance is fractional and most lenses cannot reach infinity focus on X-mount."],"formatNote":{"match":"lens-smaller-than-body","lensFormat":"16mm-cine","bodyFormat":"APS-C","cropFactor":null,"message":"Lens image circle (16mm-cine) is smaller than body sensor (APS-C) — expect heavy vignetting or black corners. Many bodies auto-crop to the smaller format and drop resolution accordingly."}}}